Originally Posted by 14+kitties
It was mentioned in a thread a while ago that male cats will not mate with their female siblings. I have to say that is so terribly wrong.
Yep, I know this for a fact. When I brought Kiska and Maks home, I scheduled them for their S&N. A week before Kiska went in, she went into heat, and Maks tried every opportunity to mate with her.
Excellent post with great information.